List Paired Devices in Android Studio

Syntax

BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
List<String> deviceList = new ArrayList<String>();

if (pairedDevices.size() > 0) {
    for (BluetoothDevice device : pairedDevices) {
        deviceList.add(device.getName() + "\n" + device.getAddress());
    }
}

Example

private void listPairedDevices() {
    BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
    List<String> deviceList = new ArrayList<String>();

    if (pairedDevices.size() > 0) {
        for (BluetoothDevice device : pairedDevices) {
            deviceList.add(device.getName() + "\n" + device.getAddress());
        }
    }

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, deviceList);
    ListView listView = (ListView) findViewById(R.id.listViewPairedDevices);
    listView.setAdapter(adapter);
}

Output

The above example code will display all the paired devices with the device name and address in a listView.

Explanation

This code generates a list of paired Bluetooth devices and displays them on an Android application using a ListView.

The BluetoothAdapter class provides access to the Bluetooth functionality of the Android device. The getDefaultAdapter() method returns a reference to the local Bluetooth adapter. The getBondedDevices() method returns a set of paired Bluetooth devices. Each BluetoothDevice object contains information on the paired device, such as name and address.

The code contains a for loop which iterates through the paired devices and adds their name and address to a list. This list is then passed to an ArrayAdapter which converts the list to a ListView display.

Use

This code can be used in Android applications that require Bluetooth functionality. It can be used to display a list of paired devices for the user to select.

Important Points

• This code will only display paired devices.
• To pair a new device, use the startActivityForResult() method to invoke the pairing process.
• The Bluetooth permission must be added to the AndroidManifest.xml file.

Summary

The listPairedDevices() method in Android Studio generates a list of paired Bluetooth devices and displays them on a ListView in an Android application. It uses the BluetoothAdapter and BluetoothDevice classes to access Bluetooth functionality and create the list of paired devices.